Combination pencil and eraser



Oct. 20, 1936. K 2,057,792

COMBINATION PENCIL AND ERASER Filed July 3, 1935 INVENTOR ATTORNEYPatented Oct. 20, 1936 UNETEB STATES PATENT OFFICE 1 Claim.

This invention relates to self-feeding lead pencils, some of whicheither are not provided with erasing means, or have the eraser solocated that it is very inconvenient to use.

The principal object of my invention is to provide a pencil casingformed with an eraser housing disposed so that the eraser is positionedconvenient for use without either inverting the pencil or having toremove a cap to expose the eraser, or perform some other and relativelyinconvenient operation.

A further object is to mount the eraser in connection with its housingor holder so that the eraser is normally concealed but may be instantlyand easily projected to position for use by the same hand holding thepencil and without shifting the hand position or inverting the pencil.In other words, if the person writing makes an error he can withoutshifting the pencil in the hand erase the error almost the instant it ismade.

A further object of the invention is to produce a simple and inexpensivedevice and yet one which will be exceedingly efiective for the pur posefor which it is designed.

These objects I accomplish by means of such structure and relativearrangement of parts as will fully appear by a perusal of the followingspecification and claim.

In the drawing similar characters of reference indicate correspondingparts in the several views:

Figure 1 is a perspective view of a combination self-feeding pencilshowing my eraser housing formed with the casing of the pencil; theeraser being in its normal concealed position.

Figure 2 is a fragmentary side view of the pencil casing partly insection showing the eraser in its concealed position.

Figure 3 is a similar view showing the eraser as extended.

Referring now more particularly to the char acters of reference on thedrawing, the pencil which may be of any of the various self-feedingtypes suitable for my purpose, comprises essentially a cylindricalcasing l tapering as at 2 to its tip as usual, from which tip the lead 3projects for writing.

Formed with the casing and extending parallel thereto for a relativelyshort distance back from the tapered portion 2 is a relatively smallcylindrical housing 4, preferably countersunk into the casing as much aspossible to conserve space. The housing is permanently closed at itsrear end but is open at the front or at the end facing the tip of thepencil, said housing merging into the tapering surface of the tipportion, as shown. The open end of said housing is normally closed by aspring actuated hinge or flap door 5.

Slidable in the housing and having a length relative thereto so as to beentirely contained therein is a sleeve 6 forming a holder in the outerportion of which a cylindrical eraser l is mounted. The sleeve adjacentits outer end is preferably provided with interior threads 8 so that theeraser as it swings down may be adjusted outwardly of the sleeve. Thesleeve is normally held I retracted in the housing by a tension spring 9sleeve to be projected so that the exposed tip 20 of the eraser will bedisposed beyond the tip of the pencil, so that said eraser may engagethe paper instead of the lid. As the eraser thus advances it of coursepushes the door open, and said door closes of itself when the eraser isagain retracted into the housing. The pencil is held so that the housingprojects between the thumb and forefinger and the element ll may then beeasily engaged and pushed forward by bending said finger backsufficiently to engage said element.

From the foregoing description it will be readily seen that I haveproduced such a device as substantially fulfills the objects of theinvention as set forth herein.

While this specification sets forth in detail the present and preferredconstruction of the device, still in practice such deviations from suchdetail may be resorted to as do not form a departure from the spirit ofthe invention, as defined by the appended claim.

Having thus described my invention, what I claim as new and useful anddesire to secure by Letters Patent is:

In combination, a tubular casing having a longitudinal depression alongone side thereof and having one end tapered, a relatively smallcylindrical housing extending parallel to and countersunk for a portionof its circumference in the depressed portion of the casing, saidhousing terminating substantially at the point of intersection of thetapered portion of the casing with said depressed portion thereof, thecasing being open at said termination; and eraser holding means slidablymounted and normally enclosed within the housing and projectible at willfrom the open end thereof.

NOBORU SAKAI.

